Bella climbs down the rest of the way, she could probably help, better than staying up there.
Then she prays for a miracle.
Spoiler
How much movement required?
If I have any actions left over, I'll Channel energy healing Hamza and all allies within 30 feet for (1d6)[3] hp, due to selective channel feat, no rats are healed.
Also one rat is set on fire for (1d6)[4] damage and dazzled 1 rd, Will Save for partial, DC 13 (success half damage and negate dazzle)